Seg Fault Exit Code
Question Text
What is the exit code of the faulty child process spawned by support/sum-array-bugs/seg-fault/sum_array_processes.d
with more than 2 processes?
Question Answers
- 11 because this is the code of the
SIGSEGV
signal
11 because this code is always returned when a process ends with an error
11 because this is the value of the least significant 4 bytes of the partial array sum calculated by the process
6 because the child process was aborted
Feedback
We can obtain the number of the signal that killed a child process via the second argument of the waitpid
syscall.
We can use the WIFSIGNALED()
and WTERMSIG()
marcros.
By doing so, we see the exit code of the faulty child process is 11.
We can then use the kill -l
command to view the code of each signal and SIGSEGV
has the code 11.